High egt

[cloker12]

Have a 97 2500 4x4 with nv 4500 ...
Have had the timing moved to 16degrees btc,4 in diamond eye, full isspro guage set,bhaf and # 11 fuel plate.
Truck runs great but i tow around 17k gvw and going up fairly step inclines my egt s will go up to 1400 degrees farenheit pretty fast in 5th ...when i drop into 4th they drop back down to around 900 to 1000 degrees
Not complaining as i think the truck is doing a pretty good job hauling the weight I'm asking it to.. but just wondering if there's something else i can do to improve the performance without breaking the bank.

 

[Signal73]

What kind of boost are you showing on your gage?

 

[Bob4x4]

Depending on your road speed, it sounds normal

 

[BigPapa]

Agreed. Sounds perfect.

EGTs are kept in check by engine speed. When EGTs get high you need to downshift to increase engine speed.

 

[cloker12]

Drop into 4th around 1700rpm when egt's get around 1200 degrees at about 60mph and then i can usually climb around 50 to 55 mph from there ...as i said not complaining just wondering if there's other mods i could do to maybe use the power i have without the high egt's

 

[GAmes]

If you add the power and climb a lot of hills/mountains with a heavy load while in 5th gear you will be replacing the NV4500. I replaced mine 11 times in about 700k miles times before upgrading to the G56. I was using 20 psi of boost as my limit for 5th gear. I still limit boost to 20 psi in overdrive but I have only replaced the input bearing on it once using the same power.

 

[cloker12]

If you add the power and climb a lot of hills/mountains with a heavy load while in 5th gear you will be replacing the NV4500. I replaced mine 11 times in about 700k miles times before upgrading to the G56. I was using 20 psi of boost as my limit for 5th gear. I still limit boost to 20 psi in overdrive but I have only replaced the input bearing on it once using the same power.

A lot of miles and transmissions for sure and a little scary to hear.
Here in Western Montana it's just about impossible to go anywhere without pulling a hill or pass somewhere but after seeing what you have gone through i plan on using 4th gear and keeping an eye on the boost for sure.

 

[BigPapa]

i plan on using 4th gear and keeping an eye on the boost for sure.

Good idea.

 

[ofelas]

Check for boost leaks & tighten up your waste gate, in that order.

 

[Seabee]

With your #11 plate and other mods you should never see 1400 degrees! My truck is set up basically the same as yours and the highest EGT I ever see is 1200-1250 EGT in fifth gear at full throttle towing around 10K. I agree with ofelas that you are probably losing boost pressure.

 

[cloker12]

Will do thanks.

With your #11 plate and other mods you should never see 1400 degrees! My truck is set up basically the same as yours and the highest EGT I ever see is 1200-1250 EGT in fifth gear at full throttle towing around 10K. I agree with ofelas that you are probably losing boost pressure.